using System;
using ICD.Common.Properties;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;

namespace ICD.Common.Utils.Extensions
{
	/// <summary>
	/// Extension methods for working with JSON.
	/// </summary>
	public static class JsonExtensions
	{
		/// <summary>
		/// Writes the object value.
		/// </summary>
		/// <param name="extends"></param>
		/// <param name="value"></param>
		/// <param name="serializer"></param>
		/// <param name="converter"></param>
		[PublicAPI]
		public static void WriteObject(this JsonWriter extends, object value, JsonSerializer serializer,
		                               JsonConverter converter)
		{
			if (extends == null)
				throw new ArgumentNullException("extends");

			if (serializer == null)
				throw new ArgumentNullException("serializer");

			if (converter == null)
				throw new ArgumentNullException("converter");

			JObject jObject = JObject.FromObject(value, serializer);
			jObject.WriteTo(extends, converter);
		}

		/// <summary>
		/// Gets the current value as an integer.
		/// </summary>
		/// <param name="extends"></param>
		/// <returns></returns>
		[PublicAPI]
		public static int GetValueAsInt(this JsonReader extends)
		{
			if (extends == null)
				throw new ArgumentNullException("extends");

			if (extends.TokenType == JsonToken.Integer)
				return (int)(long)extends.Value;

			string message = string.Format("Token {0} {1} is not {2}", extends.TokenType, extends.Value, JsonToken.Integer);
			throw new InvalidCastException(message);
		}

		/// <summary>
		/// Gets the current value as a string.
		/// </summary>
		/// <param name="extends"></param>
		/// <returns></returns>
		[PublicAPI]
		public static string GetValueAsString(this JsonReader extends)
		{
			if (extends == null)
				throw new ArgumentNullException("extends");

			if (extends.TokenType == JsonToken.String || extends.TokenType == JsonToken.Null)
				return extends.Value as string;

			string message = string.Format("Token {0} {1} is not {2}", extends.TokenType, extends.Value, JsonToken.String);
			throw new InvalidCastException(message);
		}

		/// <summary>
		/// Gets the current value as a bool.
		/// </summary>
		/// <param name="extends"></param>
		/// <returns></returns>
		[PublicAPI]
		public static bool GetValueAsBool(this JsonReader extends)
		{
			if (extends == null)
				throw new ArgumentNullException("extends");

			if (extends.TokenType == JsonToken.Boolean)
				return (bool)extends.Value;

			string message = string.Format("Token {0} {1} is not {2}", extends.TokenType, extends.Value, JsonToken.Boolean);
			throw new InvalidCastException(message);
		}

		/// <summary>
		/// Gets the current value as an enum.
		/// </summary>
		/// <param name="extends"></param>
		/// <returns></returns>
		[PublicAPI]
		public static T GetValueAsEnum<T>(this JsonReader extends)
		{
			if (extends == null)
				throw new ArgumentNullException("extends");

			if (extends.TokenType == JsonToken.String)
				return EnumUtils.Parse<T>(extends.GetValueAsString(), true);
			return (T)(object)extends.GetValueAsInt();
		}
	}
}